Brevetoxin

A cyclic polyether compounds (neurotoxin) produced by a species of phytoplankton
Real World Example
Imagine you're at a crowded party, and a person starts loudly and aggressively dominating every conversation, making it hard for anyone else to communicate. Brevetoxin acts similarly in the marine environment, where it disrupts normal biological communication by affecting nerve cells. Just like the loud party-goer who overwhelms the social setting, brevetoxin, a cyclic polyether neurotoxin produced by certain phytoplankton, overwhelms marine life by interfering with nerve signals, disrupting the ocean's delicate balance.
Practice Version
